The midfielder has been out of action since sustaining multiple ligament damage against AS Roma at Anfield in April, but began running outside at Melwood recently as Jürgen Klopp admitted he is 'ahead of schedule' at Friday's pre-Arsenal press conference.
And Henderson has praised the mentality of his teammate as he continues on his long journey towards full fitness.
Henderson wrote in his column for the official matchday programme: “Alex Oxlade-Chamberlain made everyone smile with a posting on his social media over Christmas when he revealed he’s back running on the grass pitches at Melwood.